I need a help, I am porting a new touch to MTK X20,but not know how to config the power 3.3v 、1.8v and where I can connect these two interface. I already use i2c4 and eint5 as interrupt for communicat6ion .But not know how to config the power, anyone have the document?
actually I do not really know how to config the gpio,
You have 1.8 v pins gpios. You can use Mos as switches to configure 3.3 v.
It is all given in hardware manual. Find it https://en.alpha-star.org/download/mediatek-x20-development-board-hardware-user-manual. And you might need sachamatic which you can find at https://en.alpha-star.org/download/mediatek-x20-development-board-sch-v2-0